William v



I (No Model.)

W. V. KAY.

NAIL.

No. 413,844. l`1 mmsa Jan. 7.1890.,

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N. PEI'ERS, PhnmLiuwgn-pher, wanhlngm D C UNITED STAT-ES PATENT OFFICE.

WILLIAM V. KAY, OF CHICAGO,l ILLINOIS.

NAIL.

SPECIFICATION formingpart of Letters Patent No. 418,844, dated January 7, 1890. Y

Application tiled April l2, 1889.

' the form of nail having its shankor a portion thereof barbed or threaded for the purposeof augmenting its securing property by increaS-.

ing its hold on the Wood into which it is driven. y

The primary object of my improvement is to provide anail having a thread formed on .its shank for the purpose stated, but whichr shallnot in being driven materially tear the ber of the wood; and a further object is to afford means for turning the nail when druiven to effect its tightening or withdrawal in the manner of drawing a screw. Y

To these ends my invention consists in a nail having a screw-thread formed spirally on its shank portion and interrupted at intervals longitudinally of the shank portion by Unthreaded or blank spaces.

It also consists in providing such a nail with a screw-head, or head having a diainetrical slot in its top to admit a screwdriver; and it further consists in details 0f construction and combinations of parts.

YThe accompanying drawing.. shows in perspective a pointed nail of the wire-nail variety provided with my improvements.

A is a nail having a head r at one eXtremity, which should be provided' with a diametrical slot q and pointed at its opposite eX- tremity.` Below the head the shank portion p should be smoothor blank for some distance,l(say about one-third of its length,) and from the extremity or pointed end the shank Serial No. 306,951. (No model.)

is provided with a spiral thread o, which is interrupted or broken at intervals, thereby affording unthreaded, smooth, or blank spaces n at intervals around the shank and longitudinally thereof from the end or point to the end of the spiral thread. VOwing to the nature of the article represented, but'one space n can readily be shown in the drawing. 1 In practice, however, I provide three such spaces 5o at equal distances apart along the shank, though that number may be varied without departing from my invention.

'The nail maybe driven and withdrawnlike any other nail,and, as will readily be apparent, Without material tearing or injury from the thread to the iiber of the material into which it is driven; and it may also be tightened in place or Withdrawn like a screw on turning it properly for either purpose through 6o the medium of a screw-driver or other suitable means.

Vhat I claim as new, and desire to secure by Letters Patent, is-

. 1. A nail having a spiral thread 0 onk its 65 at intervals around the 4shank portion and lengthwise thereof, substantially as and for the purpose set forth.

VILLIAM V. KAY.

In presence 0f- J. W. DYRENFORTH, M. J. BoWERs. 

